CDR74NP-680NC Equivalent & Substitute Parts

Part Overview

The CDR74NP-680NC is a 68 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 630 mA continuous current with a maximum DC resistance of 370mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1), suitable for industrial and commercial electronic assemblies requiring fixed inductance filtering and energy storage functions.

Substiute Parts

CDR74NP-680NC

Sumida America Components Inc.In Stock: 924CDR74NP-680NC Datasheet

Current PartRFQ

CDRH74NP-680MC-B

Sumida America Components Inc.In Stock: 16529CDRH74NP-680MC-B Datasheet

SimilarRFQ

SRR7045-680M

Bourns Inc.In Stock: 17270SRR7045-680M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR74NP-680NC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 68 µH (exact match required)
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Current rating: Minimum 630 mA
• DC resistance: Maximum 370mOhm or lower
• RoHS3 compliance

Secondary Compatibility Factors:

• Package footprint compatibility (nonstandard dimensions)
• Moisture sensitivity level (MSL 1 preferred)
• Operating temperature range coverage

The two substitute parts listed below meet the primary matching criteria with acceptable variations in current rating and DC resistance that remain within functional tolerance for this inductor category.

Parameter Comparison

Engineering Selection Recommendations

CDRH74NP-680MC-B (Sumida America Components Inc.)

This substitute is the primary equivalent option. It maintains the same 68 µH inductance value and shielded configuration with a current rating of 690 mA, which exceeds the original 630 mA specification. The DC resistance of 380mOhm is marginally higher than the original 370mOhm maximum but remains within acceptable tolerance for most applications. The CDRH74 series is an active product with confirmed RoHS3 compliance and unlimited MSL rating. Physical dimensions are slightly smaller (7.30mm x 7.30mm vs. 7.70mm x 7.10mm), requiring PCB footprint verification. Operating temperature range of -40°C to 100°C covers standard industrial applications.

SRR7045-680M (Bourns Inc.)

This substitute offers superior electrical performance with a 1.2 A current rating and significantly lower DC resistance of 210mOhm maximum, representing a 43% reduction in resistive losses compared to the original part. The SRR7045 series features a drum core wirewound construction with ferrite material and is an active product with RoHS3 compliance. The saturation current specification of 750mA provides additional design margin. Operating temperature range extends to 125°C, suitable for higher-temperature environments. Physical dimensions are the smallest of the three options (7.00mm x 7.00mm), requiring PCB layout confirmation. This part is recommended for applications where lower power dissipation and extended temperature operation are beneficial.

Both substitutes are active products with established supply chains, making them suitable for long-term production use in place of the obsolete CDR74NP-680NC.

Frequently Asked Questions (FAQ)

Q: Can CDRH74NP-680MC-B be used as a direct replacement for CDR74NP-680NC?

A: CDRH74NP-680MC-B meets the core electrical requirements: 68 µH inductance, shielded configuration, and current rating exceeding 630 mA. However, physical dimensions differ slightly (7.30mm x 7.30mm vs. 7.70mm x 7.10mm). PCB footprint compatibility must be verified before implementation. Both parts are RoHS3 compliant with unlimited MSL rating.

Q: What are the advantages of SRR7045-680M over the original CDR74NP-680NC?

A: The SRR7045-680M provides three key advantages: (1) significantly lower DC resistance of 210mOhm versus 370mOhm, reducing power dissipation by approximately 43%; (2) higher current rating of 1.2 A with specified saturation current of 750mA, providing greater design margin; (3) extended operating temperature range to 125°C versus unspecified for the original part. The trade-off is a smaller footprint (7.00mm x 7.00mm) requiring PCB layout verification.

Q: Are there any compatibility concerns with package dimensions?

A: All three parts use nonstandard surface mount packages with similar but not identical dimensions. The original CDR74NP-680NC measures 7.70mm x 7.10mm with 4.85mm height. CDRH74NP-680MC-B is 7.30mm x 7.30mm with 4.50mm height, and SRR7045-680M is 7.00mm x 7.00mm with 4.80mm height. PCB footprint and solder pad patterns must be evaluated for each substitute to ensure mechanical fit and electrical connectivity.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. Both CDRH74NP-680MC-B and SRR7045-680M are RoHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the compliance profile of the original CDR74NP-680NC.

Q: What is the difference in inductance tolerance between these parts?

A: The original CDR74NP-680NC specifies -15%, +25% tolerance. Both substitutes (CDRH74NP-680MC-B and SRR7045-680M) specify ±20% tolerance, which is a tighter and more symmetric specification. This provides better inductance consistency across production batches.

Q: Which substitute is recommended for high-current applications?

A: SRR7045-680M is recommended for applications requiring maximum current capacity, with a 1.2 A rating and 750mA saturation current specification. This part also features the lowest DC resistance (210mOhm), minimizing resistive heating in high-current scenarios.

Q: Can these parts be used interchangeably in existing designs?

A: Electrical interchangeability is confirmed for both substitutes based on inductance, current rating, and shielding specifications. However, physical footprint differences require PCB layout verification. Thermal performance may differ due to varying DC resistance values, particularly when using SRR7045-680M with its lower resistance characteristics.